Rollup of 3 pull requests#5666

Merged

bors merged 6 commits intorust-lang:masterfrom

flip1995:rollup-yjyvvbg

May 31, 2020

Commits on May 27, 2020

len_zero: skip ranges if feature `range_is_empty` is not enabled
ebroto
committed

Commits on May 29, 2020

add testcase that no longer ICEs
matthiaskrgr
committed

Commits on May 30, 2020

new lint: vec_resize_to_zero
tnielens
committed

Commits on May 31, 2020

Rollup merge of #5637 - montrivo:feature/vec_resize_to_zero, r=yaahc,flip1995
flip1995
authored
Rollup merge of #5656 - ebroto:len_zero_ranges, r=matthiaskrgr
flip1995
authored
Rollup merge of #5663 - matthiaskrgr:crash_test_3969, r=Manishearth
flip1995
authored